Document 7RXQ0E9gQZXkMR77KnVyLBz98

Heating Ventilating Air Conditioning Guide' 1949 Condensers, 769 air cooled, 769 design data, 732 evaporative, 770 water cooled, 770 Condition line, 61, 861 Conductance, 2, 3,118 air space, 118, 123 building materials, 119 insulators, 119 surface, 122, 586 Conduction, 3, 101,118 drying methods, 915 electric heaters, 607 equation, 102 steady-state solutions, 112 Conductivity, 3, 101, 117 bat type insulation, 121 building boards, 119 building materials, 118 homogeneous materials, 119 insulating materials, 121, 126, 682 insulation blankets, 121,126 insulators, 121, 126, 582 loose-fill insulation, 122 masonry materials, 119,126 plastering materials, 120,126 reflective insulation, 118,126 rigid insulation, 121, 127 roofing construction, 120,127 woods, 120, 127 Conductor, 3 Conduits for piping, 597 Control, controls actuated, 664 actuating, 664 airborne infection, 233 all year conditioning, 668, 670, 858 application, 670 automatic, 447, 663 fuel appliances, 357, 663, 666 temperature, 663 basic types, 663 central fan system, 672, 858 all year system, 663, 857 beating cycle, 863 coal firea plant, 666 cooling units, 670 dehumidification, 671 dehydrating equipment, 739, 944 designation, 663 draft, 344 electric beating, 607, 667 equipment for motors, 677 fan, 643 gas burner, 666 gas-fired appliances, 364, 666 beating unit, 666 'hot water supply, 961 humidity, railway cars, 930 indicating, 676 individual rooms, 664 limit, 667 modulating, 663 motor, 679 oil burners, 666 panel heating, 675 Control, controls (continued) pneumatic systems, 663 rate of biochemical reactions, 891 rate of chemical reactions, 891 rate of crystallization, 891 recording, 676 refrigeration equipment, 671 compressor type, 671 ice cooling, 671, 764 well water, 671 regain, 888 residential systems, 666 room thermostat, 667 service water temperature, 961 single phase motor, 690 ' small buildings, 666 sound, 837 squirrel-cage motor, 690 stoker, 356, 666 system control. 667 terminology, 6o3 two-position control, 663 unit cooler, 670 unit heaters, 670 unit systems, 670 unit ventilators, 670 valves, 501, 576, 665 ventilator, 174 volume, 800 zone, 668 Controllers, 663 functions, 663 types, 663 Convection, 3,101,105 equation, 103 unit conductances, 104 Convector, convectors, 3, 521, 523 correction factor, 525 heat emission, 624 heating effect, 525 ratings, 524 Converging vanes, 791 Conversion burners, 357,365 equations, 15 Coolers, 697, 703, 707 Cooling, 271{ 697 air conditioning units, 697 atmospheric water, 709, 724 ` coil selection, 157, 541 evaporative, 867 load, 66, 271, 862 methods, 457 performance of coils, 151 ponds, 713 residential, 457 sensible, 867 spray, 717, 858, 867 effect of wind, 718, 720 make-up water, 733 size of equipment, 709 winter freezing, 733 systems, 457, 867, 928 tower design, 728 tower performance, 728 units, 697 component parts, 698 control, 704 Cooling, units (continued)' definitions, 697 defrosting, 708 design, 707 performance, 707 ratings, 704 remote, 699 types of, 708 water, 725 Copper elbow equivalents, 505 Core area, 784 Corrosion, 699, 965 air ducts, 981 atmospheric, 980 cathodic protection, 983 chimney, 410 coal storage equipment, 981 cold water, 976 flues, 981 hot water, 977 industrial exhaust systems, 907 minimizing condensate, 978 pipe, 982 prevention, 978 refrigerating systems, 977 underwater, 975 Cost of air conditioning, 873 amortization, 873 condenser water, 883 first. 873 fixed charges, 873 heating, 884 installed, 875 insurance, 879 maintenance, 879 owning and operating, 873 rent, 879 service, 881 Crack length used for computations, 163, 264 Crystallization control rate of, 892 Cylinder dryer, 916 D Dalton's role, 23, 65 Damper, dampers, 857 Darcy formula, 77 Decibel, 837 Definitions, 1 Defrosting, 708 445, 800, Degree-day, 3, 420, 422 for cities, 422 formula for, method, 421 operating unit, 430 unit fuel consumption, 425 Degree of saturation, 8,36 Dehumidification, 713, 735, 861 air conditioning units, 699 air washers, 713 coil selection, 157, 539 comparison of methods, 735 control, 739 definitions and methods, 735 equipment, 739, 741 performance, 739, 741, 945 XIV Index to Technical Data Section Dehumidification (continued) estimating loads, 742 liquid methods,.740 ships, 945 solid methods, 737 Dehumidifying agents, 735 Dry, air (continued) properties of, 23 velocity head, 814 Dry-bulb temperature, 9 Dry cooling coils, 151, 529, 699, 867 Dust, 4, 179 combustible, 187 concentrations, 182, 185, 186 determination, 207 filters, 647,650 precipitators, 657 sorbents, 735 Dry return, 8. 461 absorbents, 735 adsorbents, 735 Density of air, 3, 24 ' Dryer, dryers Dew-point cabinet, 916 if, apparatus temperature, 54, 861 calculations, 918 compartment,'916 flue gas, 346 temperature, 9, 53 Dichlorodifluoromethane, 750 . cylinder, 916 ' drum, 916 rotary, 916 Dust Collectors, 656 application, 657 centrifugal, 659 cinder catching, 660 cyclone, 659 dry dynamic, 659 high efficiency, 659 electrostatic, 657 fabric, 658 spray, 917 factors affecting selection, 656 tunnel, 917 settling chambers, 660 Direct - expansion coils, 533 fired unit beater, 546 indirect heating unit, 3 radiator 7, 521 return system, 3, 508 Disc fan, 631 Distribution of air (see Air Dis tribution), 443, 783 Dryer calculations, 918 Drying, 909 calculations, 918 chart, 912 conduction, 915 constant rate period, 909 convection, 916 control, 925 testing methods, 660 wet, 658 centrifugal, 659 disintegrator, 659 dynamic precipitator, 659 orifice type, 659 packed tower, 659 washers, 658 Dynamic head, 5 estimating methods, 919 District heating, 595 automatic control, 606 glossary of rate terms, 603 meters, 601 piping, 595 conduits for, 597 inside, 599 overhead distribution, 599 sizes, 595 tunnels, 599 types of, 597, 599 rates, 603 steam requirement, 428, 603 utilization, 604 Diverging vanes, 791 Domestic oil burners, 357 Door, doors coefficients of transmission, 142 leakage, 162, 165 example, 923 factors influencing, 912 general rules for, 909 air circulation,' 913 humidity, 911 temperature, 912, humidity, 913 mechanism of, 909 - methods, 914 conduction, 915 convection, 915 radiant, 914 omissions in the cycle, 911 radiant, 612, 914 systems, 909 Duct, ducts, 433, 443, 807 air velocities in, 444, 822, 903 . approaches to outlets, 800 attenuation, 839 E EDR (Equivalent direct radia tion), 7, 381, 472, 476, 478. 480 defined, 7, 381, 524 Effective temperature (see Tem perature), 9, 222, 227 chart, 227 difference, 863 index, 225 Ejector nozzles, 796 Elbow attenuation, 842 copper equivalents, 505 friction losses, 477, 504, 906 iron equivalents, 477, 504 natural ventilation, 169 circular equivalents, 811 Down-Feed construction details, 826; 904 one-pipe riser, 3 design, 807, 821, 895, 904 Electric, electrical steam heating, 3, 466, 468 exhaust design. 895 air conditioning, 609 system, 3 elbow friction losses, 815, 816, boilers, 610 842 control systems, 663 i friction losses, 807 beat loss coefficients, 829 heaters, 607 conduction, 607 Draft, drafts, 3, 399, 443 available, 400 calculations, 399 control, 344 factors, 405 Sral equation, 400 ,4 mechanical, 399 natural, 170, 399 if- regulation, 344 requirements, 344 theoretical, 399 Drawing symbols, 17 Drip, drips, 4, 497 Drum dryer, 915 lining, 844, 847 measurement of velocities, 199 noise transmitted, 839 recirculating, 435, 446 rectangular equivalents of round, 811 --- resistance, 809, 906 roughness correction, 810 side outlets, 802 sizes^807 sound absorbers, 853' symbols for drawing,-18 system design, 436, 440, 446, 807 gravity convection, 608 radiant, 608 heating, 607 auxiliary, 612 calculating capacities, 612 central fan, 609 control, 613 domestic water, 611 elements, 607 induction, 612 power problems, 613 resistors, 607 hot water heating, 610, 611 panel heating, 620, 627 precipitators, 650, 657 radiant heating, 608 Duct sizes. 807 resistors, 607 Dry air, 1, 23 composition, 179, 333 density, 24 filters, 647 air velocities, 446, 822, 904 equal friction, 824 general rules, 821 static regain method, 824 velocity method, 823 unit beaters, 608 ' Electricity static, 892 Emissivity, 107, 118, 618, 625 factors, 107, 625 Enclosed radiator, 523 - XV